Question

What is the lost digit of
answer please​

Answer 1

Answer:

Now, 4¹ = 4

4² = 6 (16)

4³ = 4 (64)

From this we can observe,

• For a odd power unit digit will be 4
• For a even power unit digit will be 6

So,

1). 4¹⁵ + 4²⁰

= 4 + 6

= 0

Last digit is 0

2). 4¹²¹

= 4

Last digit is 4

3). 4⁵⁰⁰

= 6

Last digit is 6